Unfortunately we had to restart the live chess server today. We are investigating what was causing the issues with live chess. Until we know what caused it i can't tell whether what you experienced was bad luck, connection or the server.
We have restarted it now, so it should hopefully be ok.
Sorry 
I started a chess game a few minutes ago. The connection problem box came up for 2 secs on my second move but disappears without any problems, so i continue playing like normal. Suddenly it says i lost because game was abandoned.. No connection error warnings or anything this time, just instant loss.. What's the problem here? Is it just bad luck with connection or is it some bug?